In 1942 the Air Ministry and the Ministry
of Aviation approached Miles Aircraft with a top-secret contract for a turbojet
research plane designed to reach supersonic speeds. Designed to meet specification
E.24/43, which called for an aeroplane capable of flying over 1,000 mph
(more than twice as fast as any that had flown previously in level flight).
The Miles M.52 had many advanced features such as the ultra-thin BI-convex
wings , an annular air intake, an all-moving tailplane (which was built
and tested on the Miles "Gillette Falcon"
in 1943) and a complete escape capsule for the pilot. The engine was to
be a Power Jet W2/700 with afterburner and a specially ducted fan to increase
the airflow.

The Miles "Gillette Falcon"

A works model of the M-52

In a reciprocal agreement with the Americans, the British
Government let them have all the information regarding the M.52 in 1944,
in exchange for open excess to the US high speed program. The USA renegued
on this agreement much to the dismay of the Miles Co.

However three prototypes were ordered in 1944, with the
first of these being started in 1945. But with a Treasury savings measure
by the Labor Government, the then Director of Scientific Research, Sir
Ben Lockspeiser, canceled the project in February 1946 "in view of
the unknown hazards near the speed of sound" with over 50% of the
construction finished.